The shifting popularity of subjects often reflects shifts within the business world, Executive Speakers' Schelp says. "Changes within the business environment itself cause topic selection," he says. "The business problems people are facing, the solutions they're coming up with, are what generates the need."

高管演讲公司的舍尔普说，流行主题的变化往往反映出商业世界内部的变迁。“演讲选题随着商业环境本身的改变而变化，”他说。“人们正在面对的商业问题，以及他们正在构想的解决方案，催生了相应的需求。”

Influential new voices also guide organizations' choices of speakers and topics, Schelp says. Books such as Jim Collins' Good to Great have put a spotlight on organizational culture, prodding companies to look for speakers with expertise in that area, he says. Peter Senge, a senior lecturer at MIT's Sloan School of Management and founder of the Society for Organizational Learning, promotes decentralized leadership for enhancing productivity, and applies systems theory to organizational culture. Fees for Senge's talks top $40,000.

舍尔普说，有影响力的新声音也在指导组织对演讲者和演讲主题的选择。他说，吉姆o柯林斯的《从优秀到卓越》(Good to Great)这类书籍已经把聚光灯置于组织文化之上，从而激发公司寻找在这一领域拥有专长的演讲者。麻省理工斯隆管理学院高级讲师，组织学习协会(Society for Organizational Learning)创始人彼得o圣吉鼓吹领导层分权以提高生产率，并把系统理论应用到了组织文化之中。圣吉的出场费高达4万美元。

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